The story begins with three young riding enthusiasts' adventure - they were pretty sure to make ride a 38-mile mountainous trip in 5 hours.

Unexpectedly, they had been riding on the shady side of the mountain uphill all the way. As the night grew darker, they felt cold and exhausted. For the final 16 miles, they could no longer ride and had to push their bikes against the wind. Carl said, "If only we had bikes with electricity to give us a ride."

The three young people then couldn't stop talking about it, they had a great time. They decided to upgrade their gears and challenge themselves one more time. Unfortunately, this project was halted due to the hefty expense.